DE102017127329B4 - Self-driving tram - Google Patents

Abstract

Self-propelled trolley (10) for a rail-mounted conveyor system, comprising: a base frame (12) with a chassis (16) that can be guided in a rail system (14) of the conveyor system; Pivot axis (18) pivotably mounted container (20) for receiving goods to be transported, which has a loading opening (22) and an unloading opening (26) separated therefrom; and- a container bottom (28) for optionally closing the discharge opening (26), in which the container bottom (28) is mounted in the base frame (12) so as to be pivotable about the pivot axis (18) of the container (20) and relative to the base frame (12) ) and the container (20) is pivotable about the pivot axis (18) of the container (20), the container (20) being pivotably mounted in the base frame (12) in such a way that the container (20) is pivotable relative to the container base (28). and can be pivoted about the pivot axis (18) relative to the base frame (12), the container (20) in a state in its stowed position compared to a state in its unloading position relative to the container bottom (28) and the base frame ( 12) is pivoted.

Description

Technical field

The present invention relates to a self-propelled trolley for use in a rail-bound conveyor system.

Such trolleys are usually used to transport goods between individual stations of the conveyor system which are connected to one another by a rail system. In the context of the present disclosure, a self-propelled trolley is understood to mean a trolley that is moved in the rail system of the conveyor system without the influence of an operator. In other words, self-propelled trolleys are automatically moved within the rail system by at least one control unit of the conveyor system, for example by a decentralized control unit and / or a central control unit, and are automatically loaded and unloaded at the individual stations of the conveyor system.

State of the art

There are known rail-bound conveyor systems, such as from the DE 33 09 377 A and CH-PS 496 603, in which several trolleys guided in rails circulate between a multiplicity of stations. The trolleys are each equipped with a container for receiving transport goods, which can be loaded and unloaded at the respective stations of the conveyor system. Conveyors of this type are used, for example, to convey documents and books within a building.

In a known embodiment, the trolleys have a pivotable container with a single loading and unloading opening, through which a storage space of the container is accessible. Since the container is provided with a single loading and unloading opening, this configuration of the trolleys presupposes that the container can be pivoted through a sufficiently large angle between a loading and an unloading position. In this way it can be ensured that a transport good falls properly into the container when it is loaded and is picked up and reliably falls out of the container when unloading. Starting from its loading position, the container is usually pivoted through an angle greater than 90 °, for example 120 °, in order to assume its unloading position. However, this has an impact on the cycle times when unloading the tram.

From the WO 95/14599 A1 a trolley is also known which has a pivotable container with a loading opening and a closable unloading opening separated therefrom. More precisely, the container is mounted in a frame of the trolley so as to be pivotable about a pivot axis arranged in an upper edge region of the container. To unload the container, it swings out from a stowed position in the direction of an unloading side until an unloading position is assumed. Thereupon a container bottom closing the discharge opening is unlocked and folds out, so that the discharge opening is opened. Accordingly, the container comprises a locking mechanism which is arranged at the lower end of the container and is pivoted together with the container.

Presentation of the invention

Starting from the known prior art, it is an object of the present invention to provide a trolley for a rail-bound conveyor system which has a simple and weight-optimized structure.

The object is achieved by a self-propelled trolley with the features of claim 1. Advantageous further developments result from the subclaims.

Accordingly, a self-propelled trolley for a rail-bound conveyor system is proposed, which comprises: a base frame with a carriage that can be guided in a rail system of the conveyor system; a container, which is mounted in the base frame between a stowage position and an unloading position and can be pivoted about a pivot axis, for receiving transport goods and has a loading opening and a discharge opening separated therefrom; and a container base for optionally closing the unloading opening, in which the container base is mounted in the base frame so as to be pivotable about the pivot axis of the container and can be pivoted relative to the base frame and the container about the pivot axis of the container. The container is pivotally mounted in the base frame such that the container is pivotable relative to the container bottom and relative to the base frame about the pivot axis, the container being in its stowed position compared to a state in its unloading position relative to that Container bottom and the base frame is pivoted.

A self-propelled trolley is thus provided which is intended for use in a rail-bound conveyor system. Such conveyor systems usually have a rail system that connects several stations of the conveyor system and in which several trolleys for exchanging and transporting goods circulate between the stations. For example, such conveyors are used to convey documents, books or other objects within a building, such as a library. Furthermore, such a conveyor system can be installed in medical facilities, such as hospitals, laboratories or pharmacies, for the transport of medical goods in which particularly high hygiene requirements have to be met.

The trolley comprises a base frame with a carriage that can be guided in a rail system of the conveyor system. In other words, the trolley can be connected to the rail system of the conveyor system via the chassis and can thus be moved therein.

The basic structure of a conveyor system with a rail system connecting several loading and unloading stations and automatically guided conveyor cars therein is known to the person skilled in the art from the prior art and is therefore not described in detail here. The special features of the trolley disclosed here are therefore dealt with below.

To accommodate goods to be transported, the trolley further comprises a container which is pivotally mounted in the base frame about a pivot axis and which can be pivoted relative to the base frame between the stowed position and the unloading position. In the present case, the stowed position of the container is understood to mean a position that the container during a transport state, i. H. when moving the container along the rail system of the conveyor system. Accordingly, the unloading position of the container is understood to mean a position in which the container is arranged during loading or unloading, in particular at a loading and unloading station of the conveyor system.

The container is provided with a loading opening, through which a storage space of the container is accessible for receiving transport goods. In order to prevent unintentional falling out of transport goods from the container during transport, the loading opening of the container can preferably be closed, in particular by means of a container cover formed by the base frame. Furthermore, the container has a closable unloading opening which is separate from the loading opening and is provided for unloading the transport goods to be accommodated in the storage space of the container. In this context, a “separated discharge opening” is understood to mean an opening which is delimited from the loading opening and in particular is spaced apart. The discharge opening is preferably arranged in the region of a first end section of the container, which is positioned opposite to a second end section of the container having the loading opening.

The trolley further comprises a container floor for optionally closing and unblocking the unloading opening. More precisely, the container bottom is preferably set up to optionally prevent or allow transport goods to fall out of the container via the unloading opening. The trolley can accordingly be set up to close or release the unloading opening by means of the container base, depending on an operating state of the trolley.

In the conveyor car proposed here, the container can be pivoted about the pivot axis of the container relative to the container base and the base frame. In other words, the container is pivotable relative to the container bottom and the base frame between its stowed position and its unloading position.

This configuration of the trolley prevents the lockable container base from being pivoted together with the container in order to assume the unloading position of the container. Compared to the trolleys known from the prior art, it can accordingly be prevented that a container base which can be closed off the discharge opening must be fastened to the container together with an actuator which unlocks it, and is pivoted with the latter. In this way, the number of components to be pivoted can be reduced and a simple construction of the trolley can be ensured. This has the further effect that a rotary drive for pivoting the container can be dimensioned smaller, and the weight of the trolley can thus be saved.

In order to assume its stowed position and its unloading position, the container can be pivoted about the pivot axis relative to the container bottom and the base frame. The pivot axis can be arranged in a direction parallel to a direction of movement of the trolley along the rail system of the conveyor system. Furthermore, the pivot axis can be arranged in an inner region of the container, which is arranged within an edge region of the container and at a distance from it. More precisely, the pivot axis can be arranged in a region of the container in which a transport item to be picked up is to be arranged in its stowed position. For example, the pivot axis can be arranged in the region of a central longitudinal axis of the container. Alternatively or additionally, the pivot axis can be arranged in the region of a center of gravity of the container. In this way, a torque required to pivot the container can be reduced and so the rotary drive provided for pivoting the container can be made smaller and made lighter.

The trolley can be operated in different operating states, depending on which the position of the container relative to the container base and the base frame can be adjustable. More specifically, the trolley can be operated in a transport state in which it is moved along the rail system between stations of the conveyor system. In the transport state, the container is preferably arranged in its stowed position and its discharge opening is closed by the container bottom. In the stowed position, the container is preferably completely accommodated in the base frame. In other words, in the stowed position, the container does not protrude in any direction beyond the base frame. In this way, adequate protection of the transport goods to be transported in the container is ensured. Furthermore, a compact arrangement of the trolley can be achieved in its transport state.

In order to unload transport goods accommodated in the container, the trolley can be operated in an unloading state. For this purpose, the container can be arranged in the unloading state of the trolley in its unloading position and its unloading opening can be opened for unloading the transport goods from the container. In the unloading position, the container is preferably pivoted relative to the base frame such that the loading opening and / or the unloading opening protrude from the base frame. For example, the trolley can be designed such that, when the container is in its loading position, its loading opening and its unloading opening protrude from the base frame on opposite sides and, in particular, are arranged completely outside the base frame in order to improve their accessibility.

Furthermore, the trolley can be operated in a loaded state for receiving transport goods in the container. For this purpose, the container can be arranged in the loading state of the trolley in a loading position, which can in particular correspond to the unloading position or stowing position of the container, and its unloading opening can be closed by the container bottom.

In a further development, the trolley can be designed in such a way that the container in its stowed position relative to a state in its unloading and / or loading position by an angle of less than 90 °, in particular by an angle between 10 ° and 60 °, can be pivoted. For example, the container in its stowed position can be pivoted by essentially 30 ° or 45 ° relative to the state in its unloading and / or loading position. This has the effect that compared to known trolleys in which the container is pivoted by more than 90 ° from its stowed position to its unloading and loading position, the time for pivoting the container is reduced. In this way, cycle times for loading and unloading the trolley can be shortened, which improves the efficiency of the conveyor system.

The container base is mounted in the base frame so as to be pivotable about the pivot axis of the container. Accordingly, the container base can be pivoted relative to the base frame and the container about the pivot axis of the container. In other words, the container and the container base can be pivoted about the same pivot axis and relative to one another.

The trolley is preferably designed to arrange and hold the container base relative to the container in a closed position closing the unloading opening, in which the container base together with the container can be pivoted relative to the base frame, in order to assume its loading state. In order to assume its unloading state, the trolley can accordingly be set up to arrange the container bottom relative to the base frame in a release position that releases the unloading opening and to pivot the container from its stowed position into its unloading position relative to the base frame and the container bottom.

To pivot the container, the trolley can include the rotary drive. The rotary drive can also be set up to pivot the container together with the container base. For this purpose, the trolley can further comprise a locking mechanism for selectively blocking a movement of the container bottom relative to the container and / or the base frame. In other words, the locking mechanism can be configured to selectively generate a torque-transmitting connection between the container bottom, the container and / or the base frame. In a further development, the locking mechanism can be designed to releasably lock the container in its stowed position relative to the base frame in order to block movement of the container relative to the base frame about the pivot axis. This can be achieved, for example, in that the locking mechanism simultaneously blocks movement of the container bottom relative to the container and to the base frame. In this way, an unwanted loosening of the container prevented from its locking position and the bottom of the container from its closed position, thus improving the operational safety of the trolley in its transport state. Alternatively or additionally, the locking mechanism can be set up to releasably lock the container base relative to the base frame either in its release position or relative to the container in its closed position.

In a further development, the locking mechanism can be operated and configured to lock the container base relative to the container in its closed position and a pivoting of the container between its stowed position and its loading and / or unloading position together with the container base in the loaded state of the trolley to admit to the base frame. Alternatively or additionally, the locking mechanism can be operated and configured to lock the container bottom in its release position relative to the base frame in the unloaded state of the trolley and to permit movement of the container relative to the base frame. Furthermore, the locking mechanism can be operated and configured to lock the container in its stowed position and the container bottom in its closed position relative to the base frame in the transport state of the trolley.

The design of the trolley described above enables a single rotary drive to be required for pivoting the container and the container base. Furthermore, the present embodiment has the advantageous effect over the trolley known from the prior art that an actuator for unlocking the container bottom and thus for releasing the unloading opening does not have to be attached to the container and pivoted therewith. This is made possible in particular by the fact that the container and the container base are mounted so as to be pivotable relative to one another about the same pivot axis.

In particular, the locking mechanism can have a first locking unit for selectively locking a pivoting movement of the container base about the pivot axis relative to the base frame. For this purpose, the first locking unit can comprise a first locking element fastened to the container bottom and a complementary second locking element fastened to the base frame. The first locking element and / or the second locking element can between a locking position in which the first and the second locking element interlock and thus block the pivoting movement of the container base relative to the base frame, and a release position in which the first and the second locking element from each other are solved and the pivoting movement of the container base is released relative to the base frame, be displaceable.

In particular, the first or second locking element can be a first locking bolt that is pretensioned in the direction of its locking position and can be actuated linearly in the direction of its release position. Accordingly, the second or first locking element can be a first guide block provided with a first through opening, into which the first locking bolt can be inserted in order to assume its locking position.

Furthermore, the locking mechanism can have a second locking unit, which can be set up to release a pivoting movement of the container base relative to the base frame and to block a pivoting movement of the container base relative to the container in a first locking state. In a second locking state, the second locking unit can be set up to lock the pivoting movement of the container bottom relative to the base frame and to release the pivoting movement of the container bottom relative to the container.

More specifically, the second locking unit can have a third locking element fastened to the container bottom, which can be locked optionally with a fourth locking element fastened to the container, which is complementary thereto, or a fifth locking element fastened to the base frame and complementary thereto. The fourth and the fifth locking element can be relative to the third locking element in each case between a first locking position in which the fourth locking element interlocks with the third locking element and the fifth locking element is released from the third locking element, and a second locking position in which the fifth locking element with the third locking element interlocks and the fourth locking element is released from the third locking element, be displaceable. By interlocking the third and fourth locking elements in the first locking position of the second locking unit, movement of the container base relative to the container is blocked. Correspondingly, a movement of the container base relative to the base frame is blocked by means of the second locking unit in its second locking position, in that the third and fifth locking elements interlock.

In particular, the third locking element can be a second guide block provided with a second through opening. Correspondingly, the fourth locking element can be a second locking bolt that is preloaded in the direction of the first locking position and the fifth locking element can be a third locking bolt that is preloaded in the direction of the first locking position and can be actuated linearly in the direction of the second locking position and that can be taken into the second passage opening of the second guide block from opposite ends the first or second locking position can be inserted.

Figure list

• 1 eine Querschnittsansicht eines beispielhaften Förderwagens , der für das Verständnis der vorliegenden Erfindung hilfreich ist;
• 2 bis 4 perspektivische Ansichten auf einen Förderwagen gemäß einer Ausführungsform der vorliegenden Erfindung in unterschiedlichen Betriebszuständen;
• 5 eine teilweise transparente Ansicht auf den in 2 bis 4 gezeigten Förderwagen;
• 6 und 7 vergrößerte Ansichten auf einen Verriegelungsmechanismus des in 2 bis 5 gezeigten Förderwagens;
• 8 eine Längsschnittansicht auf einen Förderwagen einer weiteren Ausführungsform; und
• 9 und 10 vergrößerte Ansichten auf einen Verriegelungsmechanismus des in 8 gezeigten Förderwagens.

Preferred further embodiments of the invention are explained in more detail by the following description of the figures. The following schematically show:

• 1 a cross-sectional view of an exemplary trolley useful for understanding the present invention;
• 2nd to 4th perspective views of a trolley according to an embodiment of the present invention in different operating states;
• 5 a partially transparent view of the in 2nd to 4th shown tram;
• 6 and 7 enlarged views of a locking mechanism of the in 2nd to 5 shown tram;
• 8th a longitudinal sectional view of a trolley of a further embodiment; and
• 9 and 10th enlarged views of a locking mechanism of the in 8th shown tram.

Detailed description of preferred embodiments

Preferred exemplary embodiments are described below with reference to the figures. The same, similar or equivalent elements in the different figures are provided with identical reference numerals, and a repeated description of these elements is partially omitted in order to avoid redundancies.

1 shows schematically an example of a self-driving tram 10th which is helpful for understanding the present invention and which is intended for use in a rail-bound conveyor system. The tram 10th includes a base frame 12th with one in a rail system 14 of the conveyor system feasible chassis 16 . In other words, the tram 10th is about the chassis 16 with the rail system 14 the conveyor system can be connected and thus along the rail system 14 be moved.

The tram shown here 10th preferably serves to transport goods in the form of documents or books between individuals, through the rail system 14 transport and exchange interconnected stations of the conveyor system. The conveyor system can be installed within a building, for example a library. The trolley can be used for this purpose 10th a length in an X direction parallel to a moving direction of the trolley 10th along the rail system 14 substantially 60 cm, have a width in a Y direction transverse to the direction of movement of substantially 20 cm and a height in a Z direction transverse to the X and Y directions of substantially 75 cm. Alternatively, the tram 10th be provided for the transport and exchange of other goods, such as medical goods, and used in a conveyor system of a medical facility.

The conveyor wagon is used to hold transport goods 10th also one in the base frame 12th about a pivot axis 18th swivel-mounted container 20 between a stowed position and an unloading position relative to the base frame 12th is pivotable, as in 1 indicated by the arrow A. The container 20 is with a loading opening 22 provided over which a storage space 24th of the container 20 is accessible for the transport of goods. The container also includes 20 one from the loading opening 22 separate, lockable discharge opening 26 that are used to unload the in the storage space 24th of the container 20 Transport goods to be accommodated is provided. The discharge opening 26 is opposite the loading opening 22 in the container 20 arranged.

In the in 1 shown condition of the trolley 10th is the container 20 swung out in its unloading position. The container is in the unloading position 20 compared to the base frame 12th pivoted such that the loading opening 22 and the discharge opening 26 from the base frame 12th protrude and at least partially outside the base frame 12th are arranged. The container is in the stowed position 20 completely in the base frame 12th recorded as in 1 indicated by dashed lines.

The tram 10th also includes a container bottom 28 for optionally closing and releasing the discharge opening 26 . The bottom of the container 28 is through a floor of the base frame 12th educated. In other words, the bottom of the container 28 is fixed to the base frame 12th connected and can not be moved relative to this. In the storage position of the container 20 is the discharge opening 26 on the bottom of the container 28 and is closed by this. In the unloading position of the container 20 is the discharge opening 26 from the bottom of the container 28 spaced and so for unloading the container 20 Approved.

The bottom of the container 28 is thus set up to prevent transport goods from falling out of the container 20 via the discharge opening 26 to prevent in the stowed position and to allow in the unloading position. This is the tram 10th designed such that the container 20 relative to the bottom of the container 28 and the base frame 12th about the pivot axis 18th is pivotable. In other words, the container 20 is relative to the bottom of the container 28 and the base frame 12th pivotable between its stowed position and its unloading position.

To prevent transport goods from accidentally falling out of the container 20 during a transport state of the tram 10th the loading opening should be avoided 22 of the container 20 by means of a through the base frame 12th formed container ceiling 30th lockable. The loading opening is more precise 22 in the storage position of the container 20 on the tank ceiling 30th and is closed by this. The tram 10th is also set up in the stowed position of the container 20 to be loaded. For this purpose, the container cover includes 30th an opening by means of a flap 32 is lockable. The closure flap is more precise 32 biased towards a locking position and for loading the trolley 10th towards the container 20 pivotable, as indicated by the arrow B in 1 indicated. The closure flap 32 is in the in 1 illustrated state in its closed position.

The pivot axis 18th is in a direction parallel to the direction of movement of the trolley 10th along the rail system 14 and in an inner area of the container 20 arranged. The container 20 is provided in the form of an elongated hollow body with a rectangular cross section, which extends along a longitudinal axis transverse to the direction of movement of the trolley 10th extends. The pivot axis 18th is in the area of a central longitudinal axis of the container 20 arranged. The swivel axis crosses more precisely 18th the central longitudinal axis of the container 20 . The pivot axis also extends 18th preferably by a center of gravity of the container 20 .

The tram 10th is operated in different operating states. In a transport state of the tram 10th is the container 20 arranged in its stowed position and its unloading opening 26 through the bottom of the container 28 locked. To in the container 20 The trolley is used to unload the transported goods 10th further operated in a discharge state in which the container 20 arranged in its unloading position and its unloading opening 26 for unloading the transport goods from the container 20 is open. Furthermore, the tram can 10th be operated in a loaded state for receiving transport goods in the container. For this, the container 20 arranged in the stowed position and its unloading opening 26 through the bottom of the container 28 closed, the container 20 over that in the tank ceiling 30th trained and by means of the closure flap 32 closable opening can be loaded.

The tram 10th is designed such that the container 20 in a state in its stowed position is pivoted by an angle of less than 90 ° relative to a state in its unloading position. The container is more precise in the example shown here 20 in the state in its stowed position pivoted by essentially 45 ° relative to the state in its unloading position.

The tram 10th further includes a locking mechanism, not shown here, that the container 20 releasably locked in its stowed position, thus preventing undesired detachment from the stowed position.

2nd to 7 show a tram 10th a first embodiment. Opposite the in 1 example shows the tram 10th a container bottom 28 on that in the base frame 12th about the pivot axis 18th of the container 20 is pivotally mounted. In other words, the bottom of the container 28 is relative to the base frame 12th and the container 20 pivotable, as in 2nd and 4th shown.

2nd to 4th illustrate different operating states of the tram 10th . More precisely is in 2nd a loading condition, in 3rd a transport state and in 4th a state of unloading of the tram 10th shown.

As in 2nd is illustrated, the tram 10th set up to take its loading state the bottom of the container 28 relative to the container 20 in one the discharge opening 26 arrange and keep the closing position in the container bottom 28 together with the container 20 relative to the base frame 12th is pivotable. The loading opening is in this state 22 relative to the base frame 12th swung out and for receiving transport goods in the storage space 24th of the container 20 Approved. The loading opening 22 is completely outside the base frame 12th arranged. Opposite the in 1 embodiment shown corresponds to the tram shown here 10th a loading position of the container 20 its unloading position.

In the transport state of the tram 10th are the container 20 in its stowed position and the container bottom 28 arranged in its closed position, as in 3rd shown. In other words, the container 20 and the bottom of the container 28 are completely in the base frame in this state 12th added, the loading opening 22 through the container ceiling 30th and the discharge opening 26 through the bottom of the container 28 are closed.

The trolley is for taking up its unloading state 10th set up accordingly, the container bottom 28 relative to the base frame 12th in one the discharge opening 26 arrange releasing release position and the container 20 from its stowed position to its unloading position relative to the base frame 12th and the bottom of the container 28 to pan as in 4th illustrated.

As in 5 shown includes the tram 10th for swiveling the container 20 an electric rotary drive attached to the base frame 34 that has a gear 36 one along the pivot axis 18th trending and with the container 20 firmly connected drive shaft 38 actuated in rotation. The bottom of the container 28 is on the drive shaft 38 relative to the container 20 and the base frame 12th pivoted.

The tram also includes 10th one from a first locking unit 40 and a second locking unit 42 formed locking mechanism for selectively locking a movement of the container bottom 38 relative to the container 20 and / or the base frame 12th . The locking mechanism 40 , 42 is set up the container 20 relative to the base frame 12th releasably lock in its stowed position to prevent movement of the container 20 relative to the base frame 12th about the pivot axis 18th to lock and the tank bottom 28 relative to the base frame 12th optionally in its release position or relative to the container 20 releasably lock in its closed position. As in 5 shown are the first locking unit in the present embodiment 40 in a floor area of the base frame 12th and the second locking unit 42 in a side area of the base frame 12th above the rotary drive 34 arranged.

The locking mechanism is more precise 40 , 42 set up in the loaded state of the tram 10th the bottom of the container 28 relative to the container 20 lock in its closed position and pivoting of the container 20 between its stowed position and its loading and unloading position together with the container bottom 28 relative to the base frame 12th allow. Furthermore, the locking mechanism 40 , 42 set up in the unloaded state of the tram 10th the bottom of the container 28 relative to the base frame 12th lock in its release position and a movement of the container 20 relative to the base frame 12th allow. The locking mechanism is corresponding 40 , 42 in the transport state of the tram 10th set up the container 20 in its stowed position and the container bottom 28 in its closed position relative to the base frame 12th to lock.

The following are the first and second locking units 40 , 42 with reference to the 6 and 7 described in more detail. As in 6 shown is the first locking unit 40 to selectively block a pivoting movement of the container bottom 28 relative to the base frame 12th about the pivot axis 18th set up. For this purpose, the first locking unit comprises 40 one on the base frame 28 attached first locking element in the form of a first locking bolt 44 and a complementary one on the bottom of the container 28 attached second locking element in the form of a with a first through opening 46 provided first guide block 48 .

The first locking bolt 44 is between a blocking position in which it is in the first through opening 46 of the first leadership block 48 is inserted, and a release position in which this from the first guide block 48 is solved, movable. By the first locking bolt 44 into the first through opening 46 of the first leadership block 48 is inserted, there is a pivoting movement of the container bottom 28 relative to the base frame 12th blocked. The first locking bolt 44 is by means of a first spring 50 biased towards its locking position and by means of a first linear drive 52 can be actuated in the direction of its release position.

As in 7 shown is the second locking unit 42 set up to be operated either in a first or a second locked state. In the first locked state is by the second locking unit 42 a pivoting movement of the container bottom 28 relative to the base frame 12th released and a pivoting movement of the container bottom 28 relative to the container 20 blocked. The second locking unit is in the second locked state 42 set up to pivot the container bottom 28 relative to the base frame 12th to lock and the pivoting movement of the container bottom 28 relative to the container 20 to release.

More specifically, the second locking unit comprises 42 one on the bottom of the container 28 attached third locking element in the form of a further through opening 54 provided second guide block 56 , optionally with one on the container 20 attached, complementary fourth locking element in the form of a second locking bolt 58 or one on the base frame 12th attached, complementary fifth locking element in the form of a third locking bolt 60 can be locked.

The second and third locking bolts 58 , 60 are relative to the second guide block 56 between a first locking position in which the second locking bolt 58 into the second through opening 54 of the second guide block 56 is inserted and the third locking bolt 60 from the second lead block 56 is released, and a second locking position in which the third locking bolt 60 into the second through opening 54 of the second guide block 56 is inserted and the second locking bolt 58 from the second lead block 56 is solved, movable. By the second locking pin in the first locking position 58 and the second lead block 56 interlock, is a movement of the container bottom 28 relative to the container 20 blocked. Accordingly, a movement of the container bottom 28 relative to the base frame 12th by means of the second locking unit 42 locked in their second locking position by the third locking bolt 60 and the second lead block 56 interlock.

The second locking bolt 58 is by means of a second spring 62 biased towards the first locking position. The third locking bolt 60 is by means of a third spring 64 biased in the direction of the first locking position and in the direction of its second locking position by means of a second electric linear drive 66 operable. The second and third locking bolts 58 , 60 are from opposite ends in the second through hole 54 of the second guide block 56 insertable, the second locking bolt 58 by means of the second linear drive 66 actuated third locking bolt 60 is displaceable in the direction of its second locking position.

The second leadership block 56 comprises a guide section, not shown here, which is set up and designed such that when the container is pivoted 20 relative to the bottom of the container 28 in its stowed position the second locking bolt 58 is guided along the guide section and is thus moved in the direction of its second locking position. In this way it can be ensured that the container 20 pivotable into its stowed position and the second locking bolt 58 into the second through opening 54 of the second guide block 56 can be inserted.

8th to 10th show a tram 10th a second embodiment. Opposite the in 2nd to 7 The embodiment shown is in the tram shown here 10th the first locking unit 40 in a compared to the second locking unit 42 opposite side area of the trolley 10th arranged and has an alternative embodiment.

As in 9 shown is the first locking bolt 44 on the bottom of the container 28 attached and the first guide block 48 on the frame 12th . The first locking bolt 44 is between the blocking position in which it is in the first through opening 46 of the first leadership block 48 is inserted, and a release position in which this from the first guide block 48 is solved, movable. The first locking unit 40 further includes one within the first through opening 44 linear actuable actuating pin 68 by means of a third linear drive 70 is operated. The actuating pin 68 is set up to take the loading condition of the trolley 10th the first locking bolt 44 to move in the direction of its release position and to assume the unloading and / or transport state of the trolley 10th a movement of the first locking bolt 44 in the direction of its locked position. To after swiveling the container bottom 28 relative to the base frame 12th a latching between the first locking bolt 44 and the first leader block 48 ensure the first locking bolt includes 44 a further guide section, not shown here. The further guide section is set up and designed such that the first locking bolt 44 when swiveling the container bottom 28 guided along the further guide section and thus in the direction of its release position against that by the first spring 50 induced bias is moved.

Reference list

10th

Tram

12th

Base frame

14

Rail system

16

landing gear

18th

Swivel axis

20

container

22

Loading opening

24th

Storage space

26

Discharge opening

28

Tank bottom

30th

Container ceiling

32

Flap

34

Rotary drive

36

gear

38

drive shaft

40, 42

Locking mechanism

40

first locking unit

42

second locking unit

44

first locking bolt

46

first through opening

48

first leadership block

50

first spring

52

first linear drive

54

second through opening

56

second guide block

58

second locking bolt

60

third locking bolt

62

second spring

64

third spring

66

second linear actuator

68

Actuating bolt

70

third linear actuator

Claims (13)

Self-propelled trolley (10) for a rail-bound conveyor system, comprising: - A base frame (12) with a carriage (16) that can be guided in a rail system (14) of the conveyor system; - In the base frame (12) between a stowed position and an unloading position about a pivot axis (18) pivotally mounted container (20) for receiving transport goods, which has a loading opening (22) and a separate unloading opening (26); and - a container base (28) for optionally closing the unloading opening (26), in which the container base (28) is mounted in the base frame (12) so as to be pivotable about the pivot axis (18) of the container (20) and relative to the base frame (12) and the container (20) is pivotable about the pivot axis (18) of the container (20), wherein the container (20) is pivotally mounted in the base frame (12) such that the container (20) can be pivoted about the pivot axis (18) relative to the container base (28) and relative to the base frame (12), the container ( 20) is pivoted in its stowed position compared to a state in its unloading position relative to the container bottom (28) and the base frame (12). Self-driving tram according to Claim 1 , in which the pivot axis (18) of the container (20) is arranged in an inner region of the container (20), in particular in the region of a central longitudinal axis or a center of gravity of the container (20). Self-driving tram according to Claim 1 or 2nd , In a transport state of the trolley (10) the container (20) is arranged in its stowed position and its unloading opening (26) is closed by the container bottom (28) and in a unloading state of the trolley (10) the container (20) in its unloading position arranged and the unloading opening (26) for unloading the transport goods from the container (20) is open. Self-driving tram according to one of the Claims 1 to 3rd , In a loading state of the trolley (10) the container (20) is arranged in a loading position, which corresponds in particular to the unloading position or the stowed position of the container (20), and the unloading opening (26) of which is closed by the container base (28). Self-driving tram according to one of the Claims 1 to 4th , in which the container (20) in its stowed position relative to a state in its unloading and / or loading position by an angle between 10 ° and 60 °, in particular by essentially 30 ° or 45 °, around the The pivot axis (18) of the container (20) is pivoted. Self-driving tram according to Claim 1 which is designed to arrange and hold the container bottom (28) relative to the container (20) in a closed position closing the unloading opening (26) in which the container bottom (28) together with the container (20) is pivotable relative to the base frame (12), and the container bottom for assuming its discharge state (28) relative to the base frame (12) in a release position releasing the unloading opening (26) and pivoting the container (20) from its stowed position into its unloading position relative to the base frame (12) and the container bottom (28). Self-driving tram according to one of the Claims 1 to 6 which further comprises a rotary drive (34) for pivoting the container (20) relative to the base frame (12) and a locking mechanism (40, 42) for selectively blocking a movement of the container bottom (28) relative to the container (20) and / or the base frame (12), wherein the locking mechanism (40, 42) is in particular set up to releasably lock the container (20) relative to the base frame (12) in its stowed position and / or the container base (28) relative to the base frame (12) releasably lock in its release position or relative to the container (20) in its closed position. Self-driving tram according to Claim 7 , wherein the locking mechanism (40, 42) is further configured: in the loaded state of the trolley (10) to lock the container bottom (28) relative to the container (20) in its closed position and to pivot the container (20) between its stowed position and its loading and / or unloading position together with the container base (28) relative to the base frame (12), and / or in the unloaded state of the trolley (10) the container base (28) relative to the base frame (12) in its release position to lock and allow movement of the container (20) relative to the base frame (12), and / or in the transport state of the trolley (10) the container (20) in its stowed position and the container bottom (28) in its closed position relative to the Lock the base frame (12). Self-driving tram according to Claim 7 or 8th , wherein the locking mechanism (40, 42) has a first locking unit (40) for selectively locking a pivoting movement of the container base (28) about the pivot axis (18) relative to the base frame (12), which has a first fixed to the container base (28) Locking element (44; 48) and a complementary, to the base frame (12) attached second locking element (48; 44), wherein the first locking element (44; 48) and / or the second locking element (48; 44) between a locking position , in which the first and the second locking element (44, 48) interlock and thus block the pivoting movement of the container base (28) relative to the base frame (12), and a release position in which the first and the second locking element (44, 48) are separated from each other and the pivoting movement of the container base (28) is released relative to the base frame (12), are / is displaceable. Self-driving tram according to Claim 9 , wherein the first or second locking element (44, 48) is a first locking bolt (44) which is pretensioned in the direction of its locking position and can be actuated linearly in the direction of its release position, and the second or first locking element (48, 44) is a with a first through opening (46) provided first guide block (48) into which the first locking bolt (44) can be inserted in order to assume its locked position. Self-driving tram according to one of the Claims 7 to 10th , wherein the locking mechanism (40, 42) has a second locking unit (42) which is set up to release a pivoting movement of the container bottom (28) relative to the base frame (12) in a first locked state and a pivoting movement of the container bottom (28) relative to lock the container (20) and in a second locking state to block the pivoting movement of the container base (28) relative to the base frame (12) and to release the pivoting movement of the container base (28) relative to the container (20). Self-driving tram according to Claim 11 , in which the second locking unit (42) has a third locking element (56) attached to the container bottom (28), which optionally has a fourth locking element (58) attached to the container (20), complementary thereto, or one on the base frame (12 ) attached, complementary fifth locking element (60) can be locked, the fourth and fifth locking element (58, 60) relative to the third locking element (56) in each case between a first locking position in which the fourth locking element (58) with the third Locking element (56) interlocks and the fifth locking element (60) is released from the third locking element (56), and a second locking position in which the fifth locking element (60) interlocks with the third locking element (56) and the fourth locking element (58) is released from the third locking element (56), are displaceable. Self-driving tram according to Claim 12 , wherein the third locking element in the form of a second guide block (56) provided with a second through opening (54), the fourth locking element in the form of a second locking bolt (58) biased in the direction of the first locking position and the fifth locking element in the form of a direction of the first Biased locking position biased and linearly operable toward the second locking position third locking bolt (60) are provided, and wherein the second and third locking bolt (58, 60) from opposite ends in the second through hole (54) of the second guide block (56) for taking the first or second locking position can be inserted.

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